Hello, I was trying to set up one of my openwrt routers (Fritzbox 7362 SL) as a dumb access point for use with my home mesh network. My main router (Cudy x6) also has openwrt installed on it. But after disabling firewall, dhcp and dnsmasq and making the secondary router a dhcp client, I saved and applied. Now I can't login into Luci interface anymore. Even though the main router assigns the second router an ip address, and I can even connect to internet, when the second router is connected to the main router with an ethernet cable, when I enter the assigned ip address, the Luci interface is not accessible.
At this point, you'll need to use failsafe mode to fix this. We can review the files once you're able to connect, but you may find that it is faster to simply reset to defaults.
Ok, I have managed to reset the router through the failsafe mode. I was able to ssh into it and perform firstboot && reboot command. Now the router is back. Thanks for the help!